An Injectable Hydrogel as Bone Graft Material with Added Antimicrobial Properties

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Biotechnology

Background:

• Autografts are effective bone grafts but have limitations like donor site morbidity.
• Allografts and xenografts pose risks of immune rejection.
• Developing artificial bone graft materials is crucial for bone regeneration.

Purpose of the Study:

• To create and characterize novel hydrogels for bone regeneration.
• To investigate the effects of strontium and zinc ions on osteoblast behavior.
• To evaluate the mechanical properties and antimicrobial activity of the developed hydrogels.

Main Methods:

• Hydrogels were synthesized using 1,4-butanediol diacrylate and alpha tricalciumphosphate.
• Strontium chloride and zinc chloride were incorporated into the hydrogel matrix.
• MTT assay, Alizarin Red staining, rheology, and antimicrobial testing were performed.

Main Results:

• Strontium addition improved osteoblast cell density.
• Both strontium and zinc synergistically enhanced calcium deposition by osteoblasts.
• Hydrogels exhibited excellent mechanical properties, influenced by crosslinker concentration.
• The hydrogels demonstrated antimicrobial activity against Staphylococcus strains.

Conclusions:

• Strontium and zinc-containing hydrogels show significant potential for bone regeneration.
• The synergistic effect of strontium and zinc on osteogenesis is promising.
• These hydrogels possess favorable mechanical and antimicrobial characteristics for bone defect repair.